Results 21 to 30 of about 6,902 (225)

A multiswitchable poly(terthiophene) bearing a spiropyran functionality: understanding photo and electrochemical control [PDF]

, 2011
An electroactive nitrospiropyran-substituted polyterthiophene, 2-(3,3′′-dimethylindoline-6′-nitrobenzospiropyranyl)ethyl 4,4′′-didecyloxy-2,2′:5′,2′′-terthiophene-3′-acetate, has been synthesized for the first time.
Breukers, Robert, Byrne, Robert, Dennany, Lynn, Diamond, Dermot, Gambhir, Sanjeev, Higgins, Michael, Officer, David, Wagner, Klaudia, Wagner, Pawel, Wallace, Gordon, Zanoni, Michele   +10 more
core   +1 more source

Synthesis and Characterization of Azospiropyran Photochromic Dyes Based Para Nitro Aniline [PDF]

شیمی کاربردی روز, 2015
nitro-derived of azospiroptran has been synthesized by the reaction of  Fischer's base with 5-((4-nitrophenyl)diazenyl) 2-hydroxy  benzaldehyde. 5-((4-nitrophenyl)diazenyl) 2-hydroxy  benzaldehyde was obtained from the diazocoupling reaction of para ...
مریم حیدری پور, نقی سعادتجو, فرحناز نورمحمدیان   +2 more
doaj   +1 more source

Photoannealing of Merocyanine Aggregates

The Journal of Physical Chemistry A, 2018
In this work we elucidate the fundamental difference between aggregate formation of donor-π-acceptor merocyanines in their electronic ground and excited states. While increasing the π-bridge size favors formation of π-stacked aggregates in the dark, irradiation with visible light causes reorientation of the dyes to form prototype H-aggregates with ...
Felix Herrmann-Westendorf, Torsten Sachse, Martin Schulz, Martin Kaufmann, Vladimir Sivakov, Rainer Beckert, Todd Martínez, Benjamin Dietzek, Martin Presselt   +8 more
openaire   +3 more sources

Synthesis of Merocyanine Dyes [PDF]

Bulletin of the Chemical Society of Japan, 1978
Abstract New 1-ethyl-2-[(2-substituted 3-oxoisoindolin-1-ylidene)methyl]-pyridinium or quinolinium iodide merocyanine dyes were obtained by the reaction of 2-methyl quaternary salts with N-substituted phthalimide in the presence of piperidine.
Abdu E Abdel-Rahman, Zarif H Khalil
openaire   +1 more source

Micro-Capillary Coatings Based on Spiropyran Polymeric Brushes for Metal Ion Binding, Detection, and Release in Continuous Flow

Sensors, 2018
Micro-capillaries, capable of light-regulated binding and qualitative detection of divalent metal ions in continuous flow, have been realised through functionalisation with spiropyran photochromic brush-type coatings.
Aishling Dunne, Colm Delaney, Aoife McKeon, Pavel Nesterenko, Brett Paull, Fernando Benito-Lopez, Dermot Diamond, Larisa Florea   +7 more
doaj   +1 more source

Photo-responsive polymeric structures based on spiropyran [PDF]

, 2012
Spiropyrans are one of the most popular classes of photochromic compounds that change their optical and structural properties in response to external inputs such as light, protons and metal ions, making them ideal molecules for the fabrication of ...
Adelmann, Alonso, Anastasiadis, Angiolini, Bardavid, Bassetti, Beebe, Beiermann, Beiermann, Bell, Benito-Lopez, Benito-Lopez, Berkovic, Byrne, Byrne, Byrne, Byrne, Byrne, Cheng, Chung, Coleman, Coleman, Connal, Darwish, Dattilo, Davis, Delaire, Dong, Doron, Dürr, Fischer, Florea, Florea, Fries, Fries, Fries, Garcia, Guo, Higuchi, Hirshberg, Imai, Irie, Ivanov, Joseph, Kimura, Kobayashi, Kotharangannagari, Kwon, LaVan, Lee, Lee, Lee, Lee, Levy, Li, Lin, Lygeraki, Minkin, Natali, O'Bryan, Park, Park, Pennakalathil, Piech, Radu, Richter, Rosario, Rosario, Sakai, Samanta, Samoladas, Saragi, Satoh, Shiraishi, Shiraishi, Stauffer, Stitzel, Such, Sugiura, Suzuki, Tachibana, Wang, Zhao   +82 more
core   +2 more sources

E–Z Photoisomerization in Proton-Modulated Photoswitchable Merocyanine Based on Benzothiazolium and o-Hydroxynaphthalene Platform

Photochem, 2023
The potential of E–Z photoisomerization in molecular organic light-to-thermal conversion and storage in an E–styryl merocyanine system was studied in a polar acidic medium. A photoswitchable styryl merocyanine dye (E)-2-(2-(2-hydroxynaphthalen-1-yl)vinyl)
Aleksey A. Vasilev, Stanislav Baluschev, Sonia Ilieva, Diana Cheshmedzhieva   +3 more
doaj   +1 more source

Synthesis of Novel Iono- and Photochromic Spiropyrans Derived from 6,7-Dihydroxy-8-Formyl-4-Methyl-2H-Chromene-2-One

International Journal of Photoenergy, 2009
Novel photochromic spiropyrans (SPPs) containing 6′-hydroxy group were synthesized and their spectral properties as well as abilities for complexation with metal ions studied.
Olga G. Nikolaeva, Alexey V. Tsukanov, Evgenii N. Shepelenko, Boris S. Lukyanov, Anatoly V. Metelitsa, Olga Yu. Kostyrina, Alexander D. Dubonosov, Vladimir A. Bren, Vladimir I. Minkin   +8 more
doaj   +1 more source

5′-Substituted Indoline Spiropyrans: Synthesis and Applications

Colorants, 2023
Methods for preparation of 5′-substituted spiropyrans, their chemical properties, and the effects of various factors on the relative stabilities of the spiropyrans and their isomeric merocyanine forms are examined, reviewed, and discussed.
Andrey A. Khodonov, Nikolay E. Belikov, Alexey Yu. Lukin, Alexey V. Laptev, Valery A. Barachevsky, Sergey D. Varfolomeev, Olga V. Demina   +6 more
doaj   +1 more source

Theoretical and Experimental Study of New Photochromic Bis-Spiropyrans with Hydroxyethyl and Carboxyethyl Substituents

International Journal of Photoenergy, 2013
Two new asymmetrical bis-spiropyrans with nonequivalent spiropyran units have been investigated. Hydroxyethyl and carboxyethyl substituents have been used to improve thermal stability of the photoinduced merocyanine forms of the bis-spiropyrans.
E. L. Mukhanov, I. V. Dorogan, A. V. Chernyshev, S. O. Bezuglyi, I. V. Ozhogin, M. B. Lukyanova, B. S. Lukyanov   +6 more
doaj   +1 more source